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This is a mechanical change. Understanding ownership of various objects such as interceptors
is difficult in the current implementation, and it is prone to memory leaks and
accessing dangling objects.

There is follow-up work to implement support for pausing such interceptors.

Bug: 828600
Change-Id: Ic88e76be4adc45e0f341f13ff888fd1612b157a6
Reviewed-on: https://chromium-review.googlesource.com/991471Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548094}